I'm not comfortable with it. An ally may be someone with a common cause, but may also be someone who's just going along with a point of view that they have not truly considered.
Glinner, for example, is often termed an ally. But I think that does him a dis-service. He is a gender-critical man, someone who has thought hard about the subject and stands up for what he believes in.
And then there groups that have diametrically opposing views, yet agree on the gender critical aspects. Are we allies? Or is the relevant aspect of our relationship the fact that we are gender critical?